/Engine/Source/Runtime/CoreUObject/Public/Internationalization/IPackageLocalizationCache.h
Try and find the localized package name for the given source package for the given culture.
The localized package name, or NAME_None if there is no localized package.
[FName](API\Runtime\Core\UObject\FName) FindLocalizedPackageNameForCulture ( const [FName](API\Runtime\Core\UObject\FName) InSourcePackageName, const [FString](API\Runtime\Core\Containers\FString) & InCultureName )